A new compilation on Nina Kraviz's Trip label will feature a rare authorized pressing of Aphex Twin's AFX track "P-string," as Fact points out. According to Fact, the track was originally made in the early 1990s and recorded for a Peel Session. It resurfaced last year in a Soundcloud dump. "P-string" is one of seven tracks on Kraviz's When I Was 14 comp, which is out May 20. Check out the tracklist and listen to the song below.